1College of Mathematics and Information Science, Hebei Normal University, Shijiazhuang 050016
2Department of Mathematics, Capital Normal University, Beijing 100037
3CCAST (World Laboratory), PO Box 8730, Beijing 100080
4College of Physics, Hebei Normal University, Shijiazhuang 050016
Probabilistic Cloning and Quantum Computation
GAO Ting1,2,3;YAN Feng-Li3,4;WANG Zhi-Xi2
1College of Mathematics and Information Science, Hebei Normal University, Shijiazhuang 050016
2Department of Mathematics, Capital Normal University, Beijing 100037
3CCAST (World Laboratory), PO Box 8730, Beijing 100080
4College of Physics, Hebei Normal University, Shijiazhuang 050016
Abstract： We discuss the usefulness of quantum cloning and present examples of quantum computation tasks for which the cloning offers an advantage which cannot be matched by any approach that does not resort to quantum cloning. In these quantum computations, we need to distribute quantum information contained in the states about which we have some partial information. To perform quantum computations, we use a state-dependent probabilistic quantum cloning procedure to distribute quantum information in the middle of a quantum computation.
2004, Vol. 21 
